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if you have no leaks check the pressure valve switch.if you have a leak the pump will run forever until water has gone.find the pressure switch after setting up as normal,make sure barrel is full.turn the pressure switch fully clockwise.the pump will not run.open a tap and slowly turn the switch back on anti clockwise very slow until you have a flow of water and the pump has JUST started to click.close tap.pump should only run when tap is opened and the pump light is on.if you have the pump running and a green light showing on the control but no water then you have an air lock.remove pump complete add to water first and the into the van.if you have micro switches on your taps (wires going to the tap) it is possible after winter that a micro switch is stuck in the on position after leaving taps open for winter.if so replace it.check also you have closed your drain valve or water will just run through to the outside.i forgot one time in the rush to get awning up.should only take 5 minutes to fill the system with water.

with the trip if it will not go back then you could have a faulty element in the water heater tripping it out.does the water get hot on electric???

type of pressure switch

Quote: Originally posted by Janx on 27/3/2011

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if you have micro switches on your taps (wires going to the tap)

Micheal,
Do all modern taps have micro switches or are there some without?

Sorry chris don't mean to hijack your post.

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is this just the light on the main control panel that illuminates when the main pump switch is on? (If so I guess it is the red light on ours).
yes

Thanks again,
Chris.

your welcome

Hi Chris,

I too went on our maiden voyage this weekend and had the exact same problem with the Whale water pump. The caravan manual was useless on the subject. In the end I fathomed out that if you have microswitches you just don't bother putting the pump on at all. Simply open a hot water tap until water comes out, slose the tap and turn on your water heater. When it's heated you can just get hot water out of the tap as expected and the pump activates to pump more cold into the bottom of the heater, which then heats up. Simple!

Took me hours of running the pump and trying to get it to stop before sussing this out!

Marc